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1/*
2 * gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
5 * Kyösti Mälkki <kmalkki@cc.hut.fi>
6 * Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
29#include <linux/hwmon.h>
30#include <linux/hwmon-sysfs.h>
31#include <linux/hwmon-vid.h>
32#include <linux/err.h>
33#include <linux/mutex.h>
34#include <linux/sysfs.h>
35
36/* Type of the extra sensor */
37static unsigned short extra_sensor_type;
38module_param(extra_sensor_type, ushort, 0);
39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41/* Addresses to scan */
42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
43
44/*
45 * Many GL520 constants specified below
46 * One of the inputs can be configured as either temp or voltage.
47 * That's why _TEMP2 and _IN4 access the same register
48 */
49
50/* The GL520 registers */
51#define GL520_REG_CHIP_ID 0x00
52#define GL520_REG_REVISION 0x01
53#define GL520_REG_CONF 0x03
54#define GL520_REG_MASK 0x11
55
56#define GL520_REG_VID_INPUT 0x02
57
58static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
59static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
60static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
61static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
62
63static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
64static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
65static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
66
67#define GL520_REG_FAN_INPUT 0x07
68#define GL520_REG_FAN_MIN 0x08
69#define GL520_REG_FAN_DIV 0x0f
70#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
71
72#define GL520_REG_ALARMS 0x12
73#define GL520_REG_BEEP_MASK 0x10
74#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
75
76/*
77 * Function declarations
78 */
79
80static int gl520_probe(struct i2c_client *client,
81 const struct i2c_device_id *id);
82static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
83static void gl520_init_client(struct i2c_client *client);
84static int gl520_remove(struct i2c_client *client);
85static int gl520_read_value(struct i2c_client *client, u8 reg);
86static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
87static struct gl520_data *gl520_update_device(struct device *dev);
88
89/* Driver data */
90static const struct i2c_device_id gl520_id[] = {
91 { "gl520sm", 0 },
92 { }
93};
94MODULE_DEVICE_TABLE(i2c, gl520_id);
95
96static struct i2c_driver gl520_driver = {
97 .class = I2C_CLASS_HWMON,
98 .driver = {
99 .name = "gl520sm",
100 },
101 .probe = gl520_probe,
102 .remove = gl520_remove,
103 .id_table = gl520_id,
104 .detect = gl520_detect,
105 .address_list = normal_i2c,
106};
107
108/* Client data */
109struct gl520_data {
110 struct device *hwmon_dev;
111 struct mutex update_lock;
112 char valid; /* zero until the following fields are valid */
113 unsigned long last_updated; /* in jiffies */
114
115 u8 vid;
116 u8 vrm;
117 u8 in_input[5]; /* [0] = VVD */
118 u8 in_min[5]; /* [0] = VDD */
119 u8 in_max[5]; /* [0] = VDD */
120 u8 fan_input[2];
121 u8 fan_min[2];
122 u8 fan_div[2];
123 u8 fan_off;
124 u8 temp_input[2];
125 u8 temp_max[2];
126 u8 temp_max_hyst[2];
127 u8 alarms;
128 u8 beep_enable;
129 u8 beep_mask;
130 u8 alarm_mask;
131 u8 two_temps;
132};
133
134/*
135 * Sysfs stuff
136 */
137
138static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
139 char *buf)
140{
141 struct gl520_data *data = gl520_update_device(dev);
142 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
143}
144static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
145
146#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
147#define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
148
149#define IN_FROM_REG(val) ((val) * 19)
150#define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
151
152static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
153 char *buf)
154{
155 int n = to_sensor_dev_attr(attr)->index;
156 struct gl520_data *data = gl520_update_device(dev);
157 u8 r = data->in_input[n];
158
159 if (n == 0)
160 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
161 else
162 return sprintf(buf, "%d\n", IN_FROM_REG(r));
163}
164
165static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
166 char *buf)
167{
168 int n = to_sensor_dev_attr(attr)->index;
169 struct gl520_data *data = gl520_update_device(dev);
170 u8 r = data->in_min[n];
171
172 if (n == 0)
173 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
174 else
175 return sprintf(buf, "%d\n", IN_FROM_REG(r));
176}
177
178static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
179 char *buf)
180{
181 int n = to_sensor_dev_attr(attr)->index;
182 struct gl520_data *data = gl520_update_device(dev);
183 u8 r = data->in_max[n];
184
185 if (n == 0)
186 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
187 else
188 return sprintf(buf, "%d\n", IN_FROM_REG(r));
189}
190
191static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
192 const char *buf, size_t count)
193{
194 struct i2c_client *client = to_i2c_client(dev);
195 struct gl520_data *data = i2c_get_clientdata(client);
196 int n = to_sensor_dev_attr(attr)->index;
197 u8 r;
198 long v;
199 int err;
200
201 err = kstrtol(buf, 10, &v);
202 if (err)
203 return err;
204
205 mutex_lock(&data->update_lock);
206
207 if (n == 0)
208 r = VDD_TO_REG(v);
209 else
210 r = IN_TO_REG(v);
211
212 data->in_min[n] = r;
213
214 if (n < 4)
215 gl520_write_value(client, GL520_REG_IN_MIN[n],
216 (gl520_read_value(client, GL520_REG_IN_MIN[n])
217 & ~0xff) | r);
218 else
219 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
220
221 mutex_unlock(&data->update_lock);
222 return count;
223}
224
225static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
226 const char *buf, size_t count)
227{
228 struct i2c_client *client = to_i2c_client(dev);
229 struct gl520_data *data = i2c_get_clientdata(client);
230 int n = to_sensor_dev_attr(attr)->index;
231 u8 r;
232 long v;
233 int err;
234
235 err = kstrtol(buf, 10, &v);
236 if (err)
237 return err;
238
239 if (n == 0)
240 r = VDD_TO_REG(v);
241 else
242 r = IN_TO_REG(v);
243
244 mutex_lock(&data->update_lock);
245
246 data->in_max[n] = r;
247
248 if (n < 4)
249 gl520_write_value(client, GL520_REG_IN_MAX[n],
250 (gl520_read_value(client, GL520_REG_IN_MAX[n])
251 & ~0xff00) | (r << 8));
252 else
253 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
254
255 mutex_unlock(&data->update_lock);
256 return count;
257}
258
259static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
260static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
261static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
262static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
263static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
264static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
265 get_in_min, set_in_min, 0);
266static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
267 get_in_min, set_in_min, 1);
268static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
269 get_in_min, set_in_min, 2);
270static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
271 get_in_min, set_in_min, 3);
272static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
273 get_in_min, set_in_min, 4);
274static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
275 get_in_max, set_in_max, 0);
276static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
277 get_in_max, set_in_max, 1);
278static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
279 get_in_max, set_in_max, 2);
280static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
281 get_in_max, set_in_max, 3);
282static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
283 get_in_max, set_in_max, 4);
284
285#define DIV_FROM_REG(val) (1 << (val))
286#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) << (div))))
287#define FAN_TO_REG(val, div) ((val) <= 0 ? 0 : \
288 clamp_val((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
289
290static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
291 char *buf)
292{
293 int n = to_sensor_dev_attr(attr)->index;
294 struct gl520_data *data = gl520_update_device(dev);
295
296 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
297 data->fan_div[n]));
298}
299
300static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
301 char *buf)
302{
303 int n = to_sensor_dev_attr(attr)->index;
304 struct gl520_data *data = gl520_update_device(dev);
305
306 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
307 data->fan_div[n]));
308}
309
310static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
311 char *buf)
312{
313 int n = to_sensor_dev_attr(attr)->index;
314 struct gl520_data *data = gl520_update_device(dev);
315
316 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
317}
318
319static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
320 char *buf)
321{
322 struct gl520_data *data = gl520_update_device(dev);
323 return sprintf(buf, "%d\n", data->fan_off);
324}
325
326static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
327 const char *buf, size_t count)
328{
329 struct i2c_client *client = to_i2c_client(dev);
330 struct gl520_data *data = i2c_get_clientdata(client);
331 int n = to_sensor_dev_attr(attr)->index;
332 u8 r;
333 unsigned long v;
334 int err;
335
336 err = kstrtoul(buf, 10, &v);
337 if (err)
338 return err;
339
340 mutex_lock(&data->update_lock);
341 r = FAN_TO_REG(v, data->fan_div[n]);
342 data->fan_min[n] = r;
343
344 if (n == 0)
345 gl520_write_value(client, GL520_REG_FAN_MIN,
346 (gl520_read_value(client, GL520_REG_FAN_MIN)
347 & ~0xff00) | (r << 8));
348 else
349 gl520_write_value(client, GL520_REG_FAN_MIN,
350 (gl520_read_value(client, GL520_REG_FAN_MIN)
351 & ~0xff) | r);
352
353 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
354 if (data->fan_min[n] == 0)
355 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
356 else
357 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
358 data->beep_mask &= data->alarm_mask;
359 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
360
361 mutex_unlock(&data->update_lock);
362 return count;
363}
364
365static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
366 const char *buf, size_t count)
367{
368 struct i2c_client *client = to_i2c_client(dev);
369 struct gl520_data *data = i2c_get_clientdata(client);
370 int n = to_sensor_dev_attr(attr)->index;
371 u8 r;
372 unsigned long v;
373 int err;
374
375 err = kstrtoul(buf, 10, &v);
376 if (err)
377 return err;
378
379 switch (v) {
380 case 1:
381 r = 0;
382 break;
383 case 2:
384 r = 1;
385 break;
386 case 4:
387 r = 2;
388 break;
389 case 8:
390 r = 3;
391 break;
392 default:
393 dev_err(&client->dev,
394 "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
395 return -EINVAL;
396 }
397
398 mutex_lock(&data->update_lock);
399 data->fan_div[n] = r;
400
401 if (n == 0)
402 gl520_write_value(client, GL520_REG_FAN_DIV,
403 (gl520_read_value(client, GL520_REG_FAN_DIV)
404 & ~0xc0) | (r << 6));
405 else
406 gl520_write_value(client, GL520_REG_FAN_DIV,
407 (gl520_read_value(client, GL520_REG_FAN_DIV)
408 & ~0x30) | (r << 4));
409
410 mutex_unlock(&data->update_lock);
411 return count;
412}
413
414static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
415 const char *buf, size_t count)
416{
417 struct i2c_client *client = to_i2c_client(dev);
418 struct gl520_data *data = i2c_get_clientdata(client);
419 u8 r;
420 unsigned long v;
421 int err;
422
423 err = kstrtoul(buf, 10, &v);
424 if (err)
425 return err;
426
427 r = (v ? 1 : 0);
428
429 mutex_lock(&data->update_lock);
430 data->fan_off = r;
431 gl520_write_value(client, GL520_REG_FAN_OFF,
432 (gl520_read_value(client, GL520_REG_FAN_OFF)
433 & ~0x0c) | (r << 2));
434 mutex_unlock(&data->update_lock);
435 return count;
436}
437
438static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
439static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
440static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
441 get_fan_min, set_fan_min, 0);
442static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
443 get_fan_min, set_fan_min, 1);
444static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
445 get_fan_div, set_fan_div, 0);
446static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
447 get_fan_div, set_fan_div, 1);
448static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
449 get_fan_off, set_fan_off);
450
451#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
452#define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
453 (val) - 500 : (val) + 500) / 1000) + 130), 0, 255)
454
455static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 int n = to_sensor_dev_attr(attr)->index;
459 struct gl520_data *data = gl520_update_device(dev);
460
461 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
462}
463
464static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
465 char *buf)
466{
467 int n = to_sensor_dev_attr(attr)->index;
468 struct gl520_data *data = gl520_update_device(dev);
469
470 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
471}
472
473static ssize_t get_temp_max_hyst(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 int n = to_sensor_dev_attr(attr)->index;
477 struct gl520_data *data = gl520_update_device(dev);
478
479 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
480}
481
482static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
483 const char *buf, size_t count)
484{
485 struct i2c_client *client = to_i2c_client(dev);
486 struct gl520_data *data = i2c_get_clientdata(client);
487 int n = to_sensor_dev_attr(attr)->index;
488 long v;
489 int err;
490
491 err = kstrtol(buf, 10, &v);
492 if (err)
493 return err;
494
495 mutex_lock(&data->update_lock);
496 data->temp_max[n] = TEMP_TO_REG(v);
497 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
498 mutex_unlock(&data->update_lock);
499 return count;
500}
501
502static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
503 *attr, const char *buf, size_t count)
504{
505 struct i2c_client *client = to_i2c_client(dev);
506 struct gl520_data *data = i2c_get_clientdata(client);
507 int n = to_sensor_dev_attr(attr)->index;
508 long v;
509 int err;
510
511 err = kstrtol(buf, 10, &v);
512 if (err)
513 return err;
514
515 mutex_lock(&data->update_lock);
516 data->temp_max_hyst[n] = TEMP_TO_REG(v);
517 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
518 data->temp_max_hyst[n]);
519 mutex_unlock(&data->update_lock);
520 return count;
521}
522
523static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
524static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
525static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
526 get_temp_max, set_temp_max, 0);
527static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
528 get_temp_max, set_temp_max, 1);
529static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
530 get_temp_max_hyst, set_temp_max_hyst, 0);
531static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
532 get_temp_max_hyst, set_temp_max_hyst, 1);
533
534static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
535 char *buf)
536{
537 struct gl520_data *data = gl520_update_device(dev);
538 return sprintf(buf, "%d\n", data->alarms);
539}
540
541static ssize_t get_beep_enable(struct device *dev, struct device_attribute
542 *attr, char *buf)
543{
544 struct gl520_data *data = gl520_update_device(dev);
545 return sprintf(buf, "%d\n", data->beep_enable);
546}
547
548static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
549 char *buf)
550{
551 struct gl520_data *data = gl520_update_device(dev);
552 return sprintf(buf, "%d\n", data->beep_mask);
553}
554
555static ssize_t set_beep_enable(struct device *dev, struct device_attribute
556 *attr, const char *buf, size_t count)
557{
558 struct i2c_client *client = to_i2c_client(dev);
559 struct gl520_data *data = i2c_get_clientdata(client);
560 u8 r;
561 unsigned long v;
562 int err;
563
564 err = kstrtoul(buf, 10, &v);
565 if (err)
566 return err;
567
568 r = (v ? 0 : 1);
569
570 mutex_lock(&data->update_lock);
571 data->beep_enable = !r;
572 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
573 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
574 & ~0x04) | (r << 2));
575 mutex_unlock(&data->update_lock);
576 return count;
577}
578
579static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
580 const char *buf, size_t count)
581{
582 struct i2c_client *client = to_i2c_client(dev);
583 struct gl520_data *data = i2c_get_clientdata(client);
584 unsigned long r;
585 int err;
586
587 err = kstrtoul(buf, 10, &r);
588 if (err)
589 return err;
590
591 mutex_lock(&data->update_lock);
592 r &= data->alarm_mask;
593 data->beep_mask = r;
594 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
595 mutex_unlock(&data->update_lock);
596 return count;
597}
598
599static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
600static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
601 get_beep_enable, set_beep_enable);
602static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
603 get_beep_mask, set_beep_mask);
604
605static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
606 char *buf)
607{
608 int bit_nr = to_sensor_dev_attr(attr)->index;
609 struct gl520_data *data = gl520_update_device(dev);
610
611 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
612}
613
614static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
615static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
616static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
617static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
618static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
619static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
620static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
621static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
622static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
623
624static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
625 char *buf)
626{
627 int bitnr = to_sensor_dev_attr(attr)->index;
628 struct gl520_data *data = gl520_update_device(dev);
629
630 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
631}
632
633static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
634 const char *buf, size_t count)
635{
636 struct i2c_client *client = to_i2c_client(dev);
637 struct gl520_data *data = i2c_get_clientdata(client);
638 int bitnr = to_sensor_dev_attr(attr)->index;
639 unsigned long bit;
640
641 int err;
642
643 err = kstrtoul(buf, 10, &bit);
644 if (err)
645 return err;
646 if (bit & ~1)
647 return -EINVAL;
648
649 mutex_lock(&data->update_lock);
650 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
651 if (bit)
652 data->beep_mask |= (1 << bitnr);
653 else
654 data->beep_mask &= ~(1 << bitnr);
655 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
656 mutex_unlock(&data->update_lock);
657 return count;
658}
659
660static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
661static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
662static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
663static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
664static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
665static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
666static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
667static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
668static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
669
670static struct attribute *gl520_attributes[] = {
671 &dev_attr_cpu0_vid.attr,
672
673 &sensor_dev_attr_in0_input.dev_attr.attr,
674 &sensor_dev_attr_in0_min.dev_attr.attr,
675 &sensor_dev_attr_in0_max.dev_attr.attr,
676 &sensor_dev_attr_in0_alarm.dev_attr.attr,
677 &sensor_dev_attr_in0_beep.dev_attr.attr,
678 &sensor_dev_attr_in1_input.dev_attr.attr,
679 &sensor_dev_attr_in1_min.dev_attr.attr,
680 &sensor_dev_attr_in1_max.dev_attr.attr,
681 &sensor_dev_attr_in1_alarm.dev_attr.attr,
682 &sensor_dev_attr_in1_beep.dev_attr.attr,
683 &sensor_dev_attr_in2_input.dev_attr.attr,
684 &sensor_dev_attr_in2_min.dev_attr.attr,
685 &sensor_dev_attr_in2_max.dev_attr.attr,
686 &sensor_dev_attr_in2_alarm.dev_attr.attr,
687 &sensor_dev_attr_in2_beep.dev_attr.attr,
688 &sensor_dev_attr_in3_input.dev_attr.attr,
689 &sensor_dev_attr_in3_min.dev_attr.attr,
690 &sensor_dev_attr_in3_max.dev_attr.attr,
691 &sensor_dev_attr_in3_alarm.dev_attr.attr,
692 &sensor_dev_attr_in3_beep.dev_attr.attr,
693
694 &sensor_dev_attr_fan1_input.dev_attr.attr,
695 &sensor_dev_attr_fan1_min.dev_attr.attr,
696 &sensor_dev_attr_fan1_div.dev_attr.attr,
697 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
698 &sensor_dev_attr_fan1_beep.dev_attr.attr,
699 &dev_attr_fan1_off.attr,
700 &sensor_dev_attr_fan2_input.dev_attr.attr,
701 &sensor_dev_attr_fan2_min.dev_attr.attr,
702 &sensor_dev_attr_fan2_div.dev_attr.attr,
703 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
704 &sensor_dev_attr_fan2_beep.dev_attr.attr,
705
706 &sensor_dev_attr_temp1_input.dev_attr.attr,
707 &sensor_dev_attr_temp1_max.dev_attr.attr,
708 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
709 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
710 &sensor_dev_attr_temp1_beep.dev_attr.attr,
711
712 &dev_attr_alarms.attr,
713 &dev_attr_beep_enable.attr,
714 &dev_attr_beep_mask.attr,
715 NULL
716};
717
718static const struct attribute_group gl520_group = {
719 .attrs = gl520_attributes,
720};
721
722static struct attribute *gl520_attributes_in4[] = {
723 &sensor_dev_attr_in4_input.dev_attr.attr,
724 &sensor_dev_attr_in4_min.dev_attr.attr,
725 &sensor_dev_attr_in4_max.dev_attr.attr,
726 &sensor_dev_attr_in4_alarm.dev_attr.attr,
727 &sensor_dev_attr_in4_beep.dev_attr.attr,
728 NULL
729};
730
731static struct attribute *gl520_attributes_temp2[] = {
732 &sensor_dev_attr_temp2_input.dev_attr.attr,
733 &sensor_dev_attr_temp2_max.dev_attr.attr,
734 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
735 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
736 &sensor_dev_attr_temp2_beep.dev_attr.attr,
737 NULL
738};
739
740static const struct attribute_group gl520_group_in4 = {
741 .attrs = gl520_attributes_in4,
742};
743
744static const struct attribute_group gl520_group_temp2 = {
745 .attrs = gl520_attributes_temp2,
746};
747
748
749/*
750 * Real code
751 */
752
753/* Return 0 if detection is successful, -ENODEV otherwise */
754static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
755{
756 struct i2c_adapter *adapter = client->adapter;
757
758 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
759 I2C_FUNC_SMBUS_WORD_DATA))
760 return -ENODEV;
761
762 /* Determine the chip type. */
763 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
764 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
765 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
766 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
767 return -ENODEV;
768 }
769
770 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
771
772 return 0;
773}
774
775static int gl520_probe(struct i2c_client *client,
776 const struct i2c_device_id *id)
777{
778 struct gl520_data *data;
779 int err;
780
781 data = devm_kzalloc(&client->dev, sizeof(struct gl520_data),
782 GFP_KERNEL);
783 if (!data)
784 return -ENOMEM;
785
786 i2c_set_clientdata(client, data);
787 mutex_init(&data->update_lock);
788
789 /* Initialize the GL520SM chip */
790 gl520_init_client(client);
791
792 /* Register sysfs hooks */
793 err = sysfs_create_group(&client->dev.kobj, &gl520_group);
794 if (err)
795 return err;
796
797 if (data->two_temps)
798 err = sysfs_create_group(&client->dev.kobj, &gl520_group_temp2);
799 else
800 err = sysfs_create_group(&client->dev.kobj, &gl520_group_in4);
801
802 if (err)
803 goto exit_remove_files;
804
805 data->hwmon_dev = hwmon_device_register(&client->dev);
806 if (IS_ERR(data->hwmon_dev)) {
807 err = PTR_ERR(data->hwmon_dev);
808 goto exit_remove_files;
809 }
810
811 return 0;
812
813exit_remove_files:
814 sysfs_remove_group(&client->dev.kobj, &gl520_group);
815 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
816 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
817 return err;
818}
819
820
821/* Called when we have found a new GL520SM. */
822static void gl520_init_client(struct i2c_client *client)
823{
824 struct gl520_data *data = i2c_get_clientdata(client);
825 u8 oldconf, conf;
826
827 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
828
829 data->alarm_mask = 0xff;
830 data->vrm = vid_which_vrm();
831
832 if (extra_sensor_type == 1)
833 conf &= ~0x10;
834 else if (extra_sensor_type == 2)
835 conf |= 0x10;
836 data->two_temps = !(conf & 0x10);
837
838 /* If IRQ# is disabled, we can safely force comparator mode */
839 if (!(conf & 0x20))
840 conf &= 0xf7;
841
842 /* Enable monitoring if needed */
843 conf |= 0x40;
844
845 if (conf != oldconf)
846 gl520_write_value(client, GL520_REG_CONF, conf);
847
848 gl520_update_device(&(client->dev));
849
850 if (data->fan_min[0] == 0)
851 data->alarm_mask &= ~0x20;
852 if (data->fan_min[1] == 0)
853 data->alarm_mask &= ~0x40;
854
855 data->beep_mask &= data->alarm_mask;
856 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
857}
858
859static int gl520_remove(struct i2c_client *client)
860{
861 struct gl520_data *data = i2c_get_clientdata(client);
862
863 hwmon_device_unregister(data->hwmon_dev);
864 sysfs_remove_group(&client->dev.kobj, &gl520_group);
865 sysfs_remove_group(&client->dev.kobj, &gl520_group_in4);
866 sysfs_remove_group(&client->dev.kobj, &gl520_group_temp2);
867
868 return 0;
869}
870
871
872/*
873 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
874 * GL520 uses a high-byte first convention
875 */
876static int gl520_read_value(struct i2c_client *client, u8 reg)
877{
878 if ((reg >= 0x07) && (reg <= 0x0c))
879 return i2c_smbus_read_word_swapped(client, reg);
880 else
881 return i2c_smbus_read_byte_data(client, reg);
882}
883
884static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
885{
886 if ((reg >= 0x07) && (reg <= 0x0c))
887 return i2c_smbus_write_word_swapped(client, reg, value);
888 else
889 return i2c_smbus_write_byte_data(client, reg, value);
890}
891
892
893static struct gl520_data *gl520_update_device(struct device *dev)
894{
895 struct i2c_client *client = to_i2c_client(dev);
896 struct gl520_data *data = i2c_get_clientdata(client);
897 int val, i;
898
899 mutex_lock(&data->update_lock);
900
901 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
902
903 dev_dbg(&client->dev, "Starting gl520sm update\n");
904
905 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
906 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
907 data->vid = gl520_read_value(client,
908 GL520_REG_VID_INPUT) & 0x1f;
909
910 for (i = 0; i < 4; i++) {
911 data->in_input[i] = gl520_read_value(client,
912 GL520_REG_IN_INPUT[i]);
913 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
914 data->in_min[i] = val & 0xff;
915 data->in_max[i] = (val >> 8) & 0xff;
916 }
917
918 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
919 data->fan_input[0] = (val >> 8) & 0xff;
920 data->fan_input[1] = val & 0xff;
921
922 val = gl520_read_value(client, GL520_REG_FAN_MIN);
923 data->fan_min[0] = (val >> 8) & 0xff;
924 data->fan_min[1] = val & 0xff;
925
926 data->temp_input[0] = gl520_read_value(client,
927 GL520_REG_TEMP_INPUT[0]);
928 data->temp_max[0] = gl520_read_value(client,
929 GL520_REG_TEMP_MAX[0]);
930 data->temp_max_hyst[0] = gl520_read_value(client,
931 GL520_REG_TEMP_MAX_HYST[0]);
932
933 val = gl520_read_value(client, GL520_REG_FAN_DIV);
934 data->fan_div[0] = (val >> 6) & 0x03;
935 data->fan_div[1] = (val >> 4) & 0x03;
936 data->fan_off = (val >> 2) & 0x01;
937
938 data->alarms &= data->alarm_mask;
939
940 val = gl520_read_value(client, GL520_REG_CONF);
941 data->beep_enable = !((val >> 2) & 1);
942
943 /* Temp1 and Vin4 are the same input */
944 if (data->two_temps) {
945 data->temp_input[1] = gl520_read_value(client,
946 GL520_REG_TEMP_INPUT[1]);
947 data->temp_max[1] = gl520_read_value(client,
948 GL520_REG_TEMP_MAX[1]);
949 data->temp_max_hyst[1] = gl520_read_value(client,
950 GL520_REG_TEMP_MAX_HYST[1]);
951 } else {
952 data->in_input[4] = gl520_read_value(client,
953 GL520_REG_IN_INPUT[4]);
954 data->in_min[4] = gl520_read_value(client,
955 GL520_REG_IN_MIN[4]);
956 data->in_max[4] = gl520_read_value(client,
957 GL520_REG_IN_MAX[4]);
958 }
959
960 data->last_updated = jiffies;
961 data->valid = 1;
962 }
963
964 mutex_unlock(&data->update_lock);
965
966 return data;
967}
968
969module_i2c_driver(gl520_driver);
970
971MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
972 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
973 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
974MODULE_DESCRIPTION("GL520SM driver");
975MODULE_LICENSE("GPL");
1/*
2 gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4 Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
5 Kyösti Mälkki <kmalkki@cc.hut.fi>
6 Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/slab.h>
27#include <linux/jiffies.h>
28#include <linux/i2c.h>
29#include <linux/hwmon.h>
30#include <linux/hwmon-sysfs.h>
31#include <linux/hwmon-vid.h>
32#include <linux/err.h>
33#include <linux/mutex.h>
34#include <linux/sysfs.h>
35
36/* Type of the extra sensor */
37static unsigned short extra_sensor_type;
38module_param(extra_sensor_type, ushort, 0);
39MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
40
41/* Addresses to scan */
42static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
43
44/* Many GL520 constants specified below
45One of the inputs can be configured as either temp or voltage.
46That's why _TEMP2 and _IN4 access the same register
47*/
48
49/* The GL520 registers */
50#define GL520_REG_CHIP_ID 0x00
51#define GL520_REG_REVISION 0x01
52#define GL520_REG_CONF 0x03
53#define GL520_REG_MASK 0x11
54
55#define GL520_REG_VID_INPUT 0x02
56
57static const u8 GL520_REG_IN_INPUT[] = { 0x15, 0x14, 0x13, 0x0d, 0x0e };
58static const u8 GL520_REG_IN_LIMIT[] = { 0x0c, 0x09, 0x0a, 0x0b };
59static const u8 GL520_REG_IN_MIN[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x18 };
60static const u8 GL520_REG_IN_MAX[] = { 0x0c, 0x09, 0x0a, 0x0b, 0x17 };
61
62static const u8 GL520_REG_TEMP_INPUT[] = { 0x04, 0x0e };
63static const u8 GL520_REG_TEMP_MAX[] = { 0x05, 0x17 };
64static const u8 GL520_REG_TEMP_MAX_HYST[] = { 0x06, 0x18 };
65
66#define GL520_REG_FAN_INPUT 0x07
67#define GL520_REG_FAN_MIN 0x08
68#define GL520_REG_FAN_DIV 0x0f
69#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
70
71#define GL520_REG_ALARMS 0x12
72#define GL520_REG_BEEP_MASK 0x10
73#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
74
75/*
76 * Function declarations
77 */
78
79static int gl520_probe(struct i2c_client *client,
80 const struct i2c_device_id *id);
81static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info);
82static void gl520_init_client(struct i2c_client *client);
83static int gl520_remove(struct i2c_client *client);
84static int gl520_read_value(struct i2c_client *client, u8 reg);
85static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
86static struct gl520_data *gl520_update_device(struct device *dev);
87
88/* Driver data */
89static const struct i2c_device_id gl520_id[] = {
90 { "gl520sm", 0 },
91 { }
92};
93MODULE_DEVICE_TABLE(i2c, gl520_id);
94
95static struct i2c_driver gl520_driver = {
96 .class = I2C_CLASS_HWMON,
97 .driver = {
98 .name = "gl520sm",
99 },
100 .probe = gl520_probe,
101 .remove = gl520_remove,
102 .id_table = gl520_id,
103 .detect = gl520_detect,
104 .address_list = normal_i2c,
105};
106
107/* Client data */
108struct gl520_data {
109 struct device *hwmon_dev;
110 struct mutex update_lock;
111 char valid; /* zero until the following fields are valid */
112 unsigned long last_updated; /* in jiffies */
113
114 u8 vid;
115 u8 vrm;
116 u8 in_input[5]; /* [0] = VVD */
117 u8 in_min[5]; /* [0] = VDD */
118 u8 in_max[5]; /* [0] = VDD */
119 u8 fan_input[2];
120 u8 fan_min[2];
121 u8 fan_div[2];
122 u8 fan_off;
123 u8 temp_input[2];
124 u8 temp_max[2];
125 u8 temp_max_hyst[2];
126 u8 alarms;
127 u8 beep_enable;
128 u8 beep_mask;
129 u8 alarm_mask;
130 u8 two_temps;
131};
132
133/*
134 * Sysfs stuff
135 */
136
137static ssize_t get_cpu_vid(struct device *dev, struct device_attribute *attr,
138 char *buf)
139{
140 struct gl520_data *data = gl520_update_device(dev);
141 return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
142}
143static DEVICE_ATTR(cpu0_vid, S_IRUGO, get_cpu_vid, NULL);
144
145#define VDD_FROM_REG(val) (((val)*95+2)/4)
146#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
147
148#define IN_FROM_REG(val) ((val)*19)
149#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
150
151static ssize_t get_in_input(struct device *dev, struct device_attribute *attr,
152 char *buf)
153{
154 int n = to_sensor_dev_attr(attr)->index;
155 struct gl520_data *data = gl520_update_device(dev);
156 u8 r = data->in_input[n];
157
158 if (n == 0)
159 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
160 else
161 return sprintf(buf, "%d\n", IN_FROM_REG(r));
162}
163
164static ssize_t get_in_min(struct device *dev, struct device_attribute *attr,
165 char *buf)
166{
167 int n = to_sensor_dev_attr(attr)->index;
168 struct gl520_data *data = gl520_update_device(dev);
169 u8 r = data->in_min[n];
170
171 if (n == 0)
172 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
173 else
174 return sprintf(buf, "%d\n", IN_FROM_REG(r));
175}
176
177static ssize_t get_in_max(struct device *dev, struct device_attribute *attr,
178 char *buf)
179{
180 int n = to_sensor_dev_attr(attr)->index;
181 struct gl520_data *data = gl520_update_device(dev);
182 u8 r = data->in_max[n];
183
184 if (n == 0)
185 return sprintf(buf, "%d\n", VDD_FROM_REG(r));
186 else
187 return sprintf(buf, "%d\n", IN_FROM_REG(r));
188}
189
190static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
191 const char *buf, size_t count)
192{
193 struct i2c_client *client = to_i2c_client(dev);
194 struct gl520_data *data = i2c_get_clientdata(client);
195 int n = to_sensor_dev_attr(attr)->index;
196 long v = simple_strtol(buf, NULL, 10);
197 u8 r;
198
199 mutex_lock(&data->update_lock);
200
201 if (n == 0)
202 r = VDD_TO_REG(v);
203 else
204 r = IN_TO_REG(v);
205
206 data->in_min[n] = r;
207
208 if (n < 4)
209 gl520_write_value(client, GL520_REG_IN_MIN[n],
210 (gl520_read_value(client, GL520_REG_IN_MIN[n])
211 & ~0xff) | r);
212 else
213 gl520_write_value(client, GL520_REG_IN_MIN[n], r);
214
215 mutex_unlock(&data->update_lock);
216 return count;
217}
218
219static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
220 const char *buf, size_t count)
221{
222 struct i2c_client *client = to_i2c_client(dev);
223 struct gl520_data *data = i2c_get_clientdata(client);
224 int n = to_sensor_dev_attr(attr)->index;
225 long v = simple_strtol(buf, NULL, 10);
226 u8 r;
227
228 if (n == 0)
229 r = VDD_TO_REG(v);
230 else
231 r = IN_TO_REG(v);
232
233 mutex_lock(&data->update_lock);
234
235 data->in_max[n] = r;
236
237 if (n < 4)
238 gl520_write_value(client, GL520_REG_IN_MAX[n],
239 (gl520_read_value(client, GL520_REG_IN_MAX[n])
240 & ~0xff00) | (r << 8));
241 else
242 gl520_write_value(client, GL520_REG_IN_MAX[n], r);
243
244 mutex_unlock(&data->update_lock);
245 return count;
246}
247
248static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, get_in_input, NULL, 0);
249static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, get_in_input, NULL, 1);
250static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, get_in_input, NULL, 2);
251static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, get_in_input, NULL, 3);
252static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, get_in_input, NULL, 4);
253static SENSOR_DEVICE_ATTR(in0_min, S_IRUGO | S_IWUSR,
254 get_in_min, set_in_min, 0);
255static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR,
256 get_in_min, set_in_min, 1);
257static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR,
258 get_in_min, set_in_min, 2);
259static SENSOR_DEVICE_ATTR(in3_min, S_IRUGO | S_IWUSR,
260 get_in_min, set_in_min, 3);
261static SENSOR_DEVICE_ATTR(in4_min, S_IRUGO | S_IWUSR,
262 get_in_min, set_in_min, 4);
263static SENSOR_DEVICE_ATTR(in0_max, S_IRUGO | S_IWUSR,
264 get_in_max, set_in_max, 0);
265static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR,
266 get_in_max, set_in_max, 1);
267static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR,
268 get_in_max, set_in_max, 2);
269static SENSOR_DEVICE_ATTR(in3_max, S_IRUGO | S_IWUSR,
270 get_in_max, set_in_max, 3);
271static SENSOR_DEVICE_ATTR(in4_max, S_IRUGO | S_IWUSR,
272 get_in_max, set_in_max, 4);
273
274#define DIV_FROM_REG(val) (1 << (val))
275#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
276#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255))
277
278static ssize_t get_fan_input(struct device *dev, struct device_attribute *attr,
279 char *buf)
280{
281 int n = to_sensor_dev_attr(attr)->index;
282 struct gl520_data *data = gl520_update_device(dev);
283
284 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n],
285 data->fan_div[n]));
286}
287
288static ssize_t get_fan_min(struct device *dev, struct device_attribute *attr,
289 char *buf)
290{
291 int n = to_sensor_dev_attr(attr)->index;
292 struct gl520_data *data = gl520_update_device(dev);
293
294 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n],
295 data->fan_div[n]));
296}
297
298static ssize_t get_fan_div(struct device *dev, struct device_attribute *attr,
299 char *buf)
300{
301 int n = to_sensor_dev_attr(attr)->index;
302 struct gl520_data *data = gl520_update_device(dev);
303
304 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n]));
305}
306
307static ssize_t get_fan_off(struct device *dev, struct device_attribute *attr,
308 char *buf)
309{
310 struct gl520_data *data = gl520_update_device(dev);
311 return sprintf(buf, "%d\n", data->fan_off);
312}
313
314static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
315 const char *buf, size_t count)
316{
317 struct i2c_client *client = to_i2c_client(dev);
318 struct gl520_data *data = i2c_get_clientdata(client);
319 int n = to_sensor_dev_attr(attr)->index;
320 unsigned long v = simple_strtoul(buf, NULL, 10);
321 u8 r;
322
323 mutex_lock(&data->update_lock);
324 r = FAN_TO_REG(v, data->fan_div[n]);
325 data->fan_min[n] = r;
326
327 if (n == 0)
328 gl520_write_value(client, GL520_REG_FAN_MIN,
329 (gl520_read_value(client, GL520_REG_FAN_MIN)
330 & ~0xff00) | (r << 8));
331 else
332 gl520_write_value(client, GL520_REG_FAN_MIN,
333 (gl520_read_value(client, GL520_REG_FAN_MIN)
334 & ~0xff) | r);
335
336 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
337 if (data->fan_min[n] == 0)
338 data->alarm_mask &= (n == 0) ? ~0x20 : ~0x40;
339 else
340 data->alarm_mask |= (n == 0) ? 0x20 : 0x40;
341 data->beep_mask &= data->alarm_mask;
342 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
343
344 mutex_unlock(&data->update_lock);
345 return count;
346}
347
348static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
349 const char *buf, size_t count)
350{
351 struct i2c_client *client = to_i2c_client(dev);
352 struct gl520_data *data = i2c_get_clientdata(client);
353 int n = to_sensor_dev_attr(attr)->index;
354 unsigned long v = simple_strtoul(buf, NULL, 10);
355 u8 r;
356
357 switch (v) {
358 case 1: r = 0; break;
359 case 2: r = 1; break;
360 case 4: r = 2; break;
361 case 8: r = 3; break;
362 default:
363 dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
364 return -EINVAL;
365 }
366
367 mutex_lock(&data->update_lock);
368 data->fan_div[n] = r;
369
370 if (n == 0)
371 gl520_write_value(client, GL520_REG_FAN_DIV,
372 (gl520_read_value(client, GL520_REG_FAN_DIV)
373 & ~0xc0) | (r << 6));
374 else
375 gl520_write_value(client, GL520_REG_FAN_DIV,
376 (gl520_read_value(client, GL520_REG_FAN_DIV)
377 & ~0x30) | (r << 4));
378
379 mutex_unlock(&data->update_lock);
380 return count;
381}
382
383static ssize_t set_fan_off(struct device *dev, struct device_attribute *attr,
384 const char *buf, size_t count)
385{
386 struct i2c_client *client = to_i2c_client(dev);
387 struct gl520_data *data = i2c_get_clientdata(client);
388 u8 r = simple_strtoul(buf, NULL, 10)?1:0;
389
390 mutex_lock(&data->update_lock);
391 data->fan_off = r;
392 gl520_write_value(client, GL520_REG_FAN_OFF,
393 (gl520_read_value(client, GL520_REG_FAN_OFF)
394 & ~0x0c) | (r << 2));
395 mutex_unlock(&data->update_lock);
396 return count;
397}
398
399static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan_input, NULL, 0);
400static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, get_fan_input, NULL, 1);
401static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
402 get_fan_min, set_fan_min, 0);
403static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
404 get_fan_min, set_fan_min, 1);
405static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
406 get_fan_div, set_fan_div, 0);
407static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
408 get_fan_div, set_fan_div, 1);
409static DEVICE_ATTR(fan1_off, S_IRUGO | S_IWUSR,
410 get_fan_off, set_fan_off);
411
412#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
413#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
414
415static ssize_t get_temp_input(struct device *dev, struct device_attribute *attr,
416 char *buf)
417{
418 int n = to_sensor_dev_attr(attr)->index;
419 struct gl520_data *data = gl520_update_device(dev);
420
421 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n]));
422}
423
424static ssize_t get_temp_max(struct device *dev, struct device_attribute *attr,
425 char *buf)
426{
427 int n = to_sensor_dev_attr(attr)->index;
428 struct gl520_data *data = gl520_update_device(dev);
429
430 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n]));
431}
432
433static ssize_t get_temp_max_hyst(struct device *dev, struct device_attribute
434 *attr, char *buf)
435{
436 int n = to_sensor_dev_attr(attr)->index;
437 struct gl520_data *data = gl520_update_device(dev);
438
439 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n]));
440}
441
442static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
443 const char *buf, size_t count)
444{
445 struct i2c_client *client = to_i2c_client(dev);
446 struct gl520_data *data = i2c_get_clientdata(client);
447 int n = to_sensor_dev_attr(attr)->index;
448 long v = simple_strtol(buf, NULL, 10);
449
450 mutex_lock(&data->update_lock);
451 data->temp_max[n] = TEMP_TO_REG(v);
452 gl520_write_value(client, GL520_REG_TEMP_MAX[n], data->temp_max[n]);
453 mutex_unlock(&data->update_lock);
454 return count;
455}
456
457static ssize_t set_temp_max_hyst(struct device *dev, struct device_attribute
458 *attr, const char *buf, size_t count)
459{
460 struct i2c_client *client = to_i2c_client(dev);
461 struct gl520_data *data = i2c_get_clientdata(client);
462 int n = to_sensor_dev_attr(attr)->index;
463 long v = simple_strtol(buf, NULL, 10);
464
465 mutex_lock(&data->update_lock);
466 data->temp_max_hyst[n] = TEMP_TO_REG(v);
467 gl520_write_value(client, GL520_REG_TEMP_MAX_HYST[n],
468 data->temp_max_hyst[n]);
469 mutex_unlock(&data->update_lock);
470 return count;
471}
472
473static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp_input, NULL, 0);
474static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_temp_input, NULL, 1);
475static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
476 get_temp_max, set_temp_max, 0);
477static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
478 get_temp_max, set_temp_max, 1);
479static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
480 get_temp_max_hyst, set_temp_max_hyst, 0);
481static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IRUGO | S_IWUSR,
482 get_temp_max_hyst, set_temp_max_hyst, 1);
483
484static ssize_t get_alarms(struct device *dev, struct device_attribute *attr,
485 char *buf)
486{
487 struct gl520_data *data = gl520_update_device(dev);
488 return sprintf(buf, "%d\n", data->alarms);
489}
490
491static ssize_t get_beep_enable(struct device *dev, struct device_attribute
492 *attr, char *buf)
493{
494 struct gl520_data *data = gl520_update_device(dev);
495 return sprintf(buf, "%d\n", data->beep_enable);
496}
497
498static ssize_t get_beep_mask(struct device *dev, struct device_attribute *attr,
499 char *buf)
500{
501 struct gl520_data *data = gl520_update_device(dev);
502 return sprintf(buf, "%d\n", data->beep_mask);
503}
504
505static ssize_t set_beep_enable(struct device *dev, struct device_attribute
506 *attr, const char *buf, size_t count)
507{
508 struct i2c_client *client = to_i2c_client(dev);
509 struct gl520_data *data = i2c_get_clientdata(client);
510 u8 r = simple_strtoul(buf, NULL, 10)?0:1;
511
512 mutex_lock(&data->update_lock);
513 data->beep_enable = !r;
514 gl520_write_value(client, GL520_REG_BEEP_ENABLE,
515 (gl520_read_value(client, GL520_REG_BEEP_ENABLE)
516 & ~0x04) | (r << 2));
517 mutex_unlock(&data->update_lock);
518 return count;
519}
520
521static ssize_t set_beep_mask(struct device *dev, struct device_attribute *attr,
522 const char *buf, size_t count)
523{
524 struct i2c_client *client = to_i2c_client(dev);
525 struct gl520_data *data = i2c_get_clientdata(client);
526 u8 r = simple_strtoul(buf, NULL, 10);
527
528 mutex_lock(&data->update_lock);
529 r &= data->alarm_mask;
530 data->beep_mask = r;
531 gl520_write_value(client, GL520_REG_BEEP_MASK, r);
532 mutex_unlock(&data->update_lock);
533 return count;
534}
535
536static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
537static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
538 get_beep_enable, set_beep_enable);
539static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
540 get_beep_mask, set_beep_mask);
541
542static ssize_t get_alarm(struct device *dev, struct device_attribute *attr,
543 char *buf)
544{
545 int bit_nr = to_sensor_dev_attr(attr)->index;
546 struct gl520_data *data = gl520_update_device(dev);
547
548 return sprintf(buf, "%d\n", (data->alarms >> bit_nr) & 1);
549}
550
551static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, get_alarm, NULL, 0);
552static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, get_alarm, NULL, 1);
553static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, get_alarm, NULL, 2);
554static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, get_alarm, NULL, 3);
555static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, get_alarm, NULL, 4);
556static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, get_alarm, NULL, 5);
557static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, get_alarm, NULL, 6);
558static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, get_alarm, NULL, 7);
559static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, get_alarm, NULL, 7);
560
561static ssize_t get_beep(struct device *dev, struct device_attribute *attr,
562 char *buf)
563{
564 int bitnr = to_sensor_dev_attr(attr)->index;
565 struct gl520_data *data = gl520_update_device(dev);
566
567 return sprintf(buf, "%d\n", (data->beep_mask >> bitnr) & 1);
568}
569
570static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
571 const char *buf, size_t count)
572{
573 struct i2c_client *client = to_i2c_client(dev);
574 struct gl520_data *data = i2c_get_clientdata(client);
575 int bitnr = to_sensor_dev_attr(attr)->index;
576 unsigned long bit;
577
578 bit = simple_strtoul(buf, NULL, 10);
579 if (bit & ~1)
580 return -EINVAL;
581
582 mutex_lock(&data->update_lock);
583 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
584 if (bit)
585 data->beep_mask |= (1 << bitnr);
586 else
587 data->beep_mask &= ~(1 << bitnr);
588 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
589 mutex_unlock(&data->update_lock);
590 return count;
591}
592
593static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 0);
594static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 1);
595static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 2);
596static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 3);
597static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 4);
598static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 5);
599static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 6);
600static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
601static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR, get_beep, set_beep, 7);
602
603static struct attribute *gl520_attributes[] = {
604 &dev_attr_cpu0_vid.attr,
605
606 &sensor_dev_attr_in0_input.dev_attr.attr,
607 &sensor_dev_attr_in0_min.dev_attr.attr,
608 &sensor_dev_attr_in0_max.dev_attr.attr,
609 &sensor_dev_attr_in0_alarm.dev_attr.attr,
610 &sensor_dev_attr_in0_beep.dev_attr.attr,
611 &sensor_dev_attr_in1_input.dev_attr.attr,
612 &sensor_dev_attr_in1_min.dev_attr.attr,
613 &sensor_dev_attr_in1_max.dev_attr.attr,
614 &sensor_dev_attr_in1_alarm.dev_attr.attr,
615 &sensor_dev_attr_in1_beep.dev_attr.attr,
616 &sensor_dev_attr_in2_input.dev_attr.attr,
617 &sensor_dev_attr_in2_min.dev_attr.attr,
618 &sensor_dev_attr_in2_max.dev_attr.attr,
619 &sensor_dev_attr_in2_alarm.dev_attr.attr,
620 &sensor_dev_attr_in2_beep.dev_attr.attr,
621 &sensor_dev_attr_in3_input.dev_attr.attr,
622 &sensor_dev_attr_in3_min.dev_attr.attr,
623 &sensor_dev_attr_in3_max.dev_attr.attr,
624 &sensor_dev_attr_in3_alarm.dev_attr.attr,
625 &sensor_dev_attr_in3_beep.dev_attr.attr,
626
627 &sensor_dev_attr_fan1_input.dev_attr.attr,
628 &sensor_dev_attr_fan1_min.dev_attr.attr,
629 &sensor_dev_attr_fan1_div.dev_attr.attr,
630 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
631 &sensor_dev_attr_fan1_beep.dev_attr.attr,
632 &dev_attr_fan1_off.attr,
633 &sensor_dev_attr_fan2_input.dev_attr.attr,
634 &sensor_dev_attr_fan2_min.dev_attr.attr,
635 &sensor_dev_attr_fan2_div.dev_attr.attr,
636 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
637 &sensor_dev_attr_fan2_beep.dev_attr.attr,
638
639 &sensor_dev_attr_temp1_input.dev_attr.attr,
640 &sensor_dev_attr_temp1_max.dev_attr.attr,
641 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
642 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
643 &sensor_dev_attr_temp1_beep.dev_attr.attr,
644
645 &dev_attr_alarms.attr,
646 &dev_attr_beep_enable.attr,
647 &dev_attr_beep_mask.attr,
648 NULL
649};
650
651static const struct attribute_group gl520_group = {
652 .attrs = gl520_attributes,
653};
654
655static struct attribute *gl520_attributes_opt[] = {
656 &sensor_dev_attr_in4_input.dev_attr.attr,
657 &sensor_dev_attr_in4_min.dev_attr.attr,
658 &sensor_dev_attr_in4_max.dev_attr.attr,
659 &sensor_dev_attr_in4_alarm.dev_attr.attr,
660 &sensor_dev_attr_in4_beep.dev_attr.attr,
661
662 &sensor_dev_attr_temp2_input.dev_attr.attr,
663 &sensor_dev_attr_temp2_max.dev_attr.attr,
664 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
665 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
666 &sensor_dev_attr_temp2_beep.dev_attr.attr,
667 NULL
668};
669
670static const struct attribute_group gl520_group_opt = {
671 .attrs = gl520_attributes_opt,
672};
673
674
675/*
676 * Real code
677 */
678
679/* Return 0 if detection is successful, -ENODEV otherwise */
680static int gl520_detect(struct i2c_client *client, struct i2c_board_info *info)
681{
682 struct i2c_adapter *adapter = client->adapter;
683
684 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
685 I2C_FUNC_SMBUS_WORD_DATA))
686 return -ENODEV;
687
688 /* Determine the chip type. */
689 if ((gl520_read_value(client, GL520_REG_CHIP_ID) != 0x20) ||
690 ((gl520_read_value(client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
691 ((gl520_read_value(client, GL520_REG_CONF) & 0x80) != 0x00)) {
692 dev_dbg(&client->dev, "Unknown chip type, skipping\n");
693 return -ENODEV;
694 }
695
696 strlcpy(info->type, "gl520sm", I2C_NAME_SIZE);
697
698 return 0;
699}
700
701static int gl520_probe(struct i2c_client *client,
702 const struct i2c_device_id *id)
703{
704 struct gl520_data *data;
705 int err;
706
707 data = kzalloc(sizeof(struct gl520_data), GFP_KERNEL);
708 if (!data) {
709 err = -ENOMEM;
710 goto exit;
711 }
712
713 i2c_set_clientdata(client, data);
714 mutex_init(&data->update_lock);
715
716 /* Initialize the GL520SM chip */
717 gl520_init_client(client);
718
719 /* Register sysfs hooks */
720 if ((err = sysfs_create_group(&client->dev.kobj, &gl520_group)))
721 goto exit_free;
722
723 if (data->two_temps) {
724 if ((err = device_create_file(&client->dev,
725 &sensor_dev_attr_temp2_input.dev_attr))
726 || (err = device_create_file(&client->dev,
727 &sensor_dev_attr_temp2_max.dev_attr))
728 || (err = device_create_file(&client->dev,
729 &sensor_dev_attr_temp2_max_hyst.dev_attr))
730 || (err = device_create_file(&client->dev,
731 &sensor_dev_attr_temp2_alarm.dev_attr))
732 || (err = device_create_file(&client->dev,
733 &sensor_dev_attr_temp2_beep.dev_attr)))
734 goto exit_remove_files;
735 } else {
736 if ((err = device_create_file(&client->dev,
737 &sensor_dev_attr_in4_input.dev_attr))
738 || (err = device_create_file(&client->dev,
739 &sensor_dev_attr_in4_min.dev_attr))
740 || (err = device_create_file(&client->dev,
741 &sensor_dev_attr_in4_max.dev_attr))
742 || (err = device_create_file(&client->dev,
743 &sensor_dev_attr_in4_alarm.dev_attr))
744 || (err = device_create_file(&client->dev,
745 &sensor_dev_attr_in4_beep.dev_attr)))
746 goto exit_remove_files;
747 }
748
749
750 data->hwmon_dev = hwmon_device_register(&client->dev);
751 if (IS_ERR(data->hwmon_dev)) {
752 err = PTR_ERR(data->hwmon_dev);
753 goto exit_remove_files;
754 }
755
756 return 0;
757
758exit_remove_files:
759 sysfs_remove_group(&client->dev.kobj, &gl520_group);
760 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
761exit_free:
762 kfree(data);
763exit:
764 return err;
765}
766
767
768/* Called when we have found a new GL520SM. */
769static void gl520_init_client(struct i2c_client *client)
770{
771 struct gl520_data *data = i2c_get_clientdata(client);
772 u8 oldconf, conf;
773
774 conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
775
776 data->alarm_mask = 0xff;
777 data->vrm = vid_which_vrm();
778
779 if (extra_sensor_type == 1)
780 conf &= ~0x10;
781 else if (extra_sensor_type == 2)
782 conf |= 0x10;
783 data->two_temps = !(conf & 0x10);
784
785 /* If IRQ# is disabled, we can safely force comparator mode */
786 if (!(conf & 0x20))
787 conf &= 0xf7;
788
789 /* Enable monitoring if needed */
790 conf |= 0x40;
791
792 if (conf != oldconf)
793 gl520_write_value(client, GL520_REG_CONF, conf);
794
795 gl520_update_device(&(client->dev));
796
797 if (data->fan_min[0] == 0)
798 data->alarm_mask &= ~0x20;
799 if (data->fan_min[1] == 0)
800 data->alarm_mask &= ~0x40;
801
802 data->beep_mask &= data->alarm_mask;
803 gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
804}
805
806static int gl520_remove(struct i2c_client *client)
807{
808 struct gl520_data *data = i2c_get_clientdata(client);
809
810 hwmon_device_unregister(data->hwmon_dev);
811 sysfs_remove_group(&client->dev.kobj, &gl520_group);
812 sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
813
814 kfree(data);
815 return 0;
816}
817
818
819/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
820 GL520 uses a high-byte first convention */
821static int gl520_read_value(struct i2c_client *client, u8 reg)
822{
823 if ((reg >= 0x07) && (reg <= 0x0c))
824 return swab16(i2c_smbus_read_word_data(client, reg));
825 else
826 return i2c_smbus_read_byte_data(client, reg);
827}
828
829static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
830{
831 if ((reg >= 0x07) && (reg <= 0x0c))
832 return i2c_smbus_write_word_data(client, reg, swab16(value));
833 else
834 return i2c_smbus_write_byte_data(client, reg, value);
835}
836
837
838static struct gl520_data *gl520_update_device(struct device *dev)
839{
840 struct i2c_client *client = to_i2c_client(dev);
841 struct gl520_data *data = i2c_get_clientdata(client);
842 int val, i;
843
844 mutex_lock(&data->update_lock);
845
846 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
847
848 dev_dbg(&client->dev, "Starting gl520sm update\n");
849
850 data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
851 data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
852 data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
853
854 for (i = 0; i < 4; i++) {
855 data->in_input[i] = gl520_read_value(client,
856 GL520_REG_IN_INPUT[i]);
857 val = gl520_read_value(client, GL520_REG_IN_LIMIT[i]);
858 data->in_min[i] = val & 0xff;
859 data->in_max[i] = (val >> 8) & 0xff;
860 }
861
862 val = gl520_read_value(client, GL520_REG_FAN_INPUT);
863 data->fan_input[0] = (val >> 8) & 0xff;
864 data->fan_input[1] = val & 0xff;
865
866 val = gl520_read_value(client, GL520_REG_FAN_MIN);
867 data->fan_min[0] = (val >> 8) & 0xff;
868 data->fan_min[1] = val & 0xff;
869
870 data->temp_input[0] = gl520_read_value(client,
871 GL520_REG_TEMP_INPUT[0]);
872 data->temp_max[0] = gl520_read_value(client,
873 GL520_REG_TEMP_MAX[0]);
874 data->temp_max_hyst[0] = gl520_read_value(client,
875 GL520_REG_TEMP_MAX_HYST[0]);
876
877 val = gl520_read_value(client, GL520_REG_FAN_DIV);
878 data->fan_div[0] = (val >> 6) & 0x03;
879 data->fan_div[1] = (val >> 4) & 0x03;
880 data->fan_off = (val >> 2) & 0x01;
881
882 data->alarms &= data->alarm_mask;
883
884 val = gl520_read_value(client, GL520_REG_CONF);
885 data->beep_enable = !((val >> 2) & 1);
886
887 /* Temp1 and Vin4 are the same input */
888 if (data->two_temps) {
889 data->temp_input[1] = gl520_read_value(client,
890 GL520_REG_TEMP_INPUT[1]);
891 data->temp_max[1] = gl520_read_value(client,
892 GL520_REG_TEMP_MAX[1]);
893 data->temp_max_hyst[1] = gl520_read_value(client,
894 GL520_REG_TEMP_MAX_HYST[1]);
895 } else {
896 data->in_input[4] = gl520_read_value(client,
897 GL520_REG_IN_INPUT[4]);
898 data->in_min[4] = gl520_read_value(client,
899 GL520_REG_IN_MIN[4]);
900 data->in_max[4] = gl520_read_value(client,
901 GL520_REG_IN_MAX[4]);
902 }
903
904 data->last_updated = jiffies;
905 data->valid = 1;
906 }
907
908 mutex_unlock(&data->update_lock);
909
910 return data;
911}
912
913
914static int __init sensors_gl520sm_init(void)
915{
916 return i2c_add_driver(&gl520_driver);
917}
918
919static void __exit sensors_gl520sm_exit(void)
920{
921 i2c_del_driver(&gl520_driver);
922}
923
924
925MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
926 "Kyösti Mälkki <kmalkki@cc.hut.fi>, "
927 "Maarten Deprez <maartendeprez@users.sourceforge.net>");
928MODULE_DESCRIPTION("GL520SM driver");
929MODULE_LICENSE("GPL");
930
931module_init(sensors_gl520sm_init);
932module_exit(sensors_gl520sm_exit);